He stands poised, ears erect, at the edge of wide cart path, staring into the woods.
A chipmunk, a squirrel, a robin, even, catching his momentary interest.
But it is only momentary. Less than a minute, really. Waiting for a signal.
Waiting for a louder call into the woods -- the tipping point to the chase.
It doesn't come.
Instead he hears, let's go dog! and his wild revelry is broken.
Thirty feet later, he does it again.